The remaster: a bridge, two bands, and a real modem

Adds the cel-shaded skin, the score and the sound, and puts the skin
machinery back so the toggle under the frame has somewhere to go.

The remaster is a bridge rather than a paper column: the ship down the left
as meters and pips, a cel-shaded sensor grid in the middle, the log down the
right. Both panels are devices -- break the short range sensors and the
sector grid goes dark, break the computer and the chart does, and the chart
draws what has been scanned rather than the galaxy as it is. Scans are drawn
instead of printed, so the log gets the sentences and stops being eight rows
of ASCII squeezed into a strip.

One theme, two arrangements, so switching skin re-scores the piece rather
than changing the record: brass, strings and timpani for the remaster, the
same eight bars as a three-channel chiptune for 1971. Written in the idiom
rather than quoted from it, for the same reason the game is not called what
you expect -- NOTICE.md now argues both. Effects are the ship's: warp, beams,
torpedo, hit, explode, klaxon, dock, and the print head on paper only.

The boot dials in for real: Bell 103 at the real frequencies, which is what a
110-baud acoustic coupler sounded like and not the modem noise everybody
remembers. The synth engine is the siblings', unforked.

Tests cover the music the only way a test can: a mistyped note name does not
throw, it silently removes a voice, so every step of every track is checked
against the parser.

src/game/highscores.ts

@@ -62,7 +62,7 @@ async function call(path: string, init?: RequestInit): Promise<unknown> {
   const res = await fetch(`${BASE}${path}`, {
     ...init,
     signal: AbortSignal.timeout(TIMEOUT_MS),
-    headers: { 'content-type': 'application/json', ...(init?.headers ?? {}) },
+    headers: { 'content-type': 'application/json', ...init?.headers },
   })
   const body: unknown = await res.json().catch(() => null)
   if (!res.ok) {